Bucky, a 4-year-old male castrated pit bull dog, presented for chronic cough and lethargy. When asked about diet, the owner jokingly mentioned how Bucky loves to eat crayfish from the stream that runs through his property. You perform a fecal sedimentation (see image below).
Which of the following is the most likely cause of Bucky's signs?
(A) Capillaria spp.
(B) Diphyllobothrium latum
(C) Echinococcus spp.
(D) Nanophyetus salmincola
(E) Paragonimus spp.
Bonus Question 1: (True/False) Cats may also be infected by this parasite.
Bonus Question 2: What is the proper name for the little cap seen at one pole of the ova?